The probability that individual is left-handed is 0.18. In class of 40 students, what are the mean and the standard deviation of the number of left-handed students in the class?
A. Mean: 7.2; standard deviation: 2.68328157
B. Mean: 40; standard deviation: 2.68
C. Mean: 40; standard deivation: 2.43
D. Mean: 7.2; standard deviation: 2.43